    /****************************************************************************
    **
    ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
    ** All rights reserved.
    ** Contact: Nokia Corporation (qt-info@nokia.com)
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL$
    ** GNU Lesser General Public License Usage
    ** This file may be used under the terms of the GNU Lesser General Public
    ** License version 2.1 as published by the Free Software Foundation and
    ** appearing in the file LICENSE.LGPL included in the packaging of this
    ** file. Please review the following information to ensure the GNU Lesser
    ** General Public License version 2.1 requirements will be met:
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** In addition, as a special exception, Nokia gives you certain additional
    ** rights. These rights are described in the Nokia Qt LGPL Exception
    ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
    **
    ** GNU General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU General
    ** Public License version 3.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of this
    ** file. Please review the following information to ensure the GNU General
    ** Public License version 3.0 requirements will be met:
    ** http://www.gnu.org/copyleft/gpl.html.
    **
    ** Other Usage
    ** Alternatively, this file may be used in accordance with the terms and
    ** conditions contained in a signed written agreement between you and Nokia.
    **
    **
    **
    **
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/
     
    #include "glextensions.h"
     
    #define RESOLVE_GL_FUNC(f) ok &= bool((f = (_gl##f) context->getProcAddress(QLatin1String("gl" #f))));
     
    bool GLExtensionFunctions::resolve(const QGLContext *context)
     {
            bool ok = true;
     
            RESOLVE_GL_FUNC(GenFramebuffersEXT)
            RESOLVE_GL_FUNC(GenRenderbuffersEXT)
            RESOLVE_GL_FUNC(BindRenderbufferEXT)
            RESOLVE_GL_FUNC(RenderbufferStorageEXT)
            RESOLVE_GL_FUNC(DeleteFramebuffersEXT)
            RESOLVE_GL_FUNC(DeleteRenderbuffersEXT)
            RESOLVE_GL_FUNC(BindFramebufferEXT)
            RESOLVE_GL_FUNC(FramebufferTexture2DEXT)
            RESOLVE_GL_FUNC(FramebufferRenderbufferEXT)
            RESOLVE_GL_FUNC(CheckFramebufferStatusEXT)
     
            RESOLVE_GL_FUNC(ActiveTexture)
            RESOLVE_GL_FUNC(TexImage3D)
     
            RESOLVE_GL_FUNC(GenBuffers)
            RESOLVE_GL_FUNC(BindBuffer)
            RESOLVE_GL_FUNC(BufferData)
            RESOLVE_GL_FUNC(DeleteBuffers)
            RESOLVE_GL_FUNC(MapBuffer)
            RESOLVE_GL_FUNC(UnmapBuffer)
     
            return ok;
    }
     
    bool GLExtensionFunctions::fboSupported()  {
        return GenFramebuffersEXT
                && GenRenderbuffersEXT
                && BindRenderbufferEXT
                && RenderbufferStorageEXT
                && DeleteFramebuffersEXT
                && DeleteRenderbuffersEXT
                && BindFramebufferEXT
                && FramebufferTexture2DEXT
                && FramebufferRenderbufferEXT
                && CheckFramebufferStatusEXT;
    }
     
    bool GLExtensionFunctions::openGL15Supported()  {
        return ActiveTexture
                && TexImage3D
                && GenBuffers
                && BindBuffer
                && BufferData
                && DeleteBuffers
                && MapBuffer
                && UnmapBuffer;
    }
     
    #undef RESOLVE_GL_FUNC
